Collar protector for rotary drill pipes



' May 20, 1924.

P, LOI

COLLAR PROTECTOR F OR ROTARY DRILL PIPES Filed Aug. 22,

INVENTOR.

0-5 wwn A TTORNEXQ Patented May 20,1924.

UNITED, STATES PETER LOI, OF MARICOPA, CALIFORNIA. I

' COLLAR PROTECTOR FOR ROTARY DRILL rrrns;

Application filed August 22, 1921; Serial No; 494,338.

To aZZ whom it may concern:

Be it known that I, PETER L01, a citizen of the United States, residingat Maricopa, in the county of Kern and State of California, haveinvented new and useful Improvements in Collar Protectors for RotaryDrill Pipes, of which the following is a specification.

My invention relates generally to drilling apparatus, and moreparticularly to protecting devices for the collars or nipples that areutilized for connecting rotary drill pipe sections to each other; theprincipal object of my invention being to provide a relatively simple,practical and inexpensive protecting device in the nature of a sleevethat may be easily and quickly applied to rotary drill pipe sections,and which will, when properly applied, wholly enclose the connectingcollar or nipple and protect the same against wear while in operation.

It will be understood that the connecting collars or nipples of rotarydrill pipe sec-- tions are subject to rapid wear as a result of contactwith the well casing or the wall of the drill hole, and when the collarsor nipples become worn to a certain degree they will expand under theweightvof the lower portion of the drill pipe, thereby permitting asection of said pipe to become detached from the upper section, and as aresult much time and labor is involved in fishing and removing thebroken section.

It is the purpose of my invention to provide simple means which, whenapplied for use, will prevent wear of the collars or connecting nipplesand consequently eliminate the dropping of the lower portionoof thedrill pipe and likewise eliminating the time labor and expense involvedin the fishing operations.

With the foregoing and other objects in View, my invention consists incertain novel features of construction and arrangement of parts thatwill be hereinafter more fully described and claimed and illustrated inthe accompanying drawings, in which:

Figure 1 is a side elevational view of a portion of a rotary drill pipe,and showing my improvedcollar protecting device in position thereupon.

Fig. 2 is a vertical section taken on the line 22 of Fig. 1. e I

Fig. 3 is an elevational view of the adjacent ends of two sections ofdrill pipe connected by theusual collar or nipple, and

with packing rings arranged at the ends of said collar or nipple. A i

Referring by numerals to the accompanying drawings which. illustrateapractical embodiment of my invention, 10-'10 'desig nate sections ofrotary drill pipe, the end portions thereof being externally threaded inorder that they may be seated in the ends of an internally threadedcollar or nipple 11, and which manner of coupling rotary drill pipesections is now in general use.

The protecting device contemplated by my invention includes a sleeve 12,the opening 13 through the lower portion of which is of such size as toreceive one of the drill pipe sections 10, and the opening 14 in theupper portion of said sleeve being of such slze as to accommodate thecollar or nipple i 12 an annular horizontally disposed shoulder 15,andwhen the device is applied for use, a packing ring or gasket 16 offibrous material, leather, or rubber is positioned on the shoulder 15and serves as a seat for the lower face of the corresponding collar. orv nipple 11. The upper portion of opening 14 in the sleeve 12 isinternally threaded in order to receiye the externally threaded lowerportion of a short tube section 17, and interposed between the lower endthereof and the upper edge of the collar or nipple is a packing ring orgasket 18 of fibrous'material rubber, or leather. 7

When the tubular member 17 is screwed into sleeve 12, the packing rings16 and 18 are compressed against the ends of the collar or nipple 11,thereby effectually preventing sand and the like from entering thejoints between the ends of the drill pipe sections 10 and the collar 11,and which sand, if permitted to enter, would very rapidly cut thethreads so as to permit the joints to open and the parts to separate.

Sleeve 12 is secured to one of the drill pipe sections 10 by one or moreset screws, such as 19, and which latter are seated in the lower portionof said sleeve, and the upper portion of the protecting device issecured to the upper drill pipe section 10 by set screws, such as 20,that pass through the upper portion of tubular member 17.

Thus it will be seen that I have provided a relatively simple andpractical protecting device for the connecting collars or nipples drillpipe sections and the connecting collar therefor, of a protecting devicecomprising a pair of detachably connected tubular members applied to thepipe'sections and enclosing the connecting collar, packing ringsarranged between the parts of the protecting member and the ends of thedrill pipe connecting collar, and means for securing the tubular membersof the protecting device to the drill pipe sections With which I theyare associated.

In testimony whereof I- have signed my name to this specification;

PETER LOL-

